Improvement in bolt and rivet trimmers



R. FAWCETVT.

Bolt and Rivet-Trimmers.

NO lSlHl, Patented Mag/19,1874.

UNrrED STATES PATENT OFFICE,

RICHARD FAVCETT, OF SALEM, OHIO.

IMPROVEMENT IN BOLT AND RIVET TRIMMERS.

Specification forming pari of Letters Patent No. 151,111, dated May 19, 1874; application filed October 17, 1873.

To all whom it may concern:

Be it known that I, RICHARD FAwoE'rr, ofV

Salem, county of Columbiana and State of Ohio, have invented certain new and useful Improvements in Bolt and Rivet Trimmers, of which the following is a specification:

My invention relates to certain improvements in bolt and rivet trimmers,in which the cutter is constructed and operates after the manner of a chisel sliding in a slotted bar 5 and it consists in a metallic plate inserted in a recess near the front end of the bar, having a hole for the reception of the end of the bolt to be trimmed, serving as a gage for the length of the bolt and a bearing for the same, and capable of being removed and replaced by another of different dimensions. The invention consists, further, in an adjustable pivoted laterally-vibrating link, forming the main bear ing and support of the lever," which operates the cutter, and connects said lever with the bar. The invention consists, further, in acutter formed and operated like a chisel sliding in a slot in the bar, and provided with a series of holes for adjusting it when worn.

In the accompanying drawing, Figure 1 represents a bottom view of my improved bolt and rivet trimmer. Fig. 2 is a central longitudinal section. Fig. 3 is a top view with lever l) and handle d removed. Fig. 4 is a lon gitudinal sectional view. Fig. 5 is a transverse sectional view.

A represents a metallic bar provided with a handle, a, and having a slot, al, running nearly its entire length, and a smaller slot, a2, near its front end. On the under side or face of the bar the slot a? has a portion cut away at the inner end, and has its sides beveled inward to allow of the insertion of a tempered steel plate, R, of oblong form, as shown in Fig. 1. This plate has its edges beveled to correspond with the beveled sides of the slot a2, so that when in place it is held after the manner of a dovetail. The plate B has ahole for the reception of the end of the bolt or rivet to be trimmed, and its thickness corresponds with the length of bolt which is desired to be left protruding after trimming. When in place it intervenes between the nut and under side of the cutter, and serves as a bearing for the bolt, iittin g closely to the sides of the bolt, and evenly distributing the pressure, and can be readily removed and reversed endwise if worn, bringing the rear face of the hole in front, or may be replaced by another of different thickness, or oney having a hole toA correspond with a different-sized bolt. C is an adjustable pivoted laterally-vibratin g link', forming the main bearing and support of the lever l), which operates the cutter, and connects said lever with the bar A. The connecting-pivot o1 upon which the link G vibrates, has its bearing in a block, e, inserted in a recess in the bar -A, near the handle. This block e may be moved longitudinally in the recess, and the bearing of the pivot o1 placed forward by means of the movable pieces of metal that may be placed back of the block e, for adjusting the cutter when ground back in sharpening. When the block e has reached its forward limit of movement it may be returned to the back end of the recess, and the cutter moved forward upon the eccentric-pin, and the adjustment continued by these means jointly, until the cutter is worn out. The pivot o1 passes through the block e, and through a washer-plate, f, which has grooves on its inner face for engagement with tongues on the bar A, so as to prevent lateral displacement of the washer-plate. The pivot c1 is secured by a pin or key. At the forward end of the link G is an enlargement, c2, forming an eye,

in which the lever D has its bearing, said lever being provided with a handle d. Project ing from the bearing or fulcrum of the lever is an eccentric-pin, cl2, which passes through the cutter, and is held in place by a pin or key. responding in width with the slot al, so as to slide free-ly therein, and has a series of perforations for engagement with the pin d2, by which means, in connection with the adjustment of the link G, as already described, the cutter is moved forward or back, as desired. It is also formed with a ange, g, projecting over each side of the slot al, and serving to guide and hold it in place. The forward end is beveled and sharpened, as a chisel, for cutting.

In using this instrument the handles t d. are separated at an angle of ninety degrees, more 0r less, and the end of the bolt or rivet is in- The cutter G has its rear portion corA link C, constructed and operating substantiallyr as shown and described.

3. The cutter Gr Working in the slot al, and having rear portion provided With a series of perforations for the purpose of adjusting it, substantially as shown and described.

In testimony that I claim the foregoing as my invention I hereunto affix my signature.

RICHARD FAWCETT.

Witnesses B. FRANK TABER, R. B. ENGLE. 

